Arrangement for ventilating of railway carriages, buses and similar vehicles



May 6, 1952 s. o. RYGARD ARRANGEMENT FOR VENTILATING OF RAILWAYCARRIAGES BUSES AND SIMILAR VEHICLES 2 SHEETS-SHEET 1 Filed Oct. 25,1947 JNVENTOR June 05.51am Rz gara BY MAM ATTORNEY y 5 I s o RYGARD2,595,370

ARRANGEMENT F OR VENTILATING OF RAILWAY CARRIAGES, BUSES AND SIMILARVEHICLES Filed 001. 25, 1947 2 SPEET$-SHEET 2 FIG. 4

INVENTOR Sune 055/011 Rygom (Mam M A TZOKNEY tion inlet for the used airor also from both of them in variable proportions.

The arrangement acts in the following manner. The air is sucked inthrough the opening between the cap I and the flange 2 and passesthrough the annular channel between the mantle l and the body I6 to thefan-wheel l9. From the latter the air will be conducted by way of achannel-system (not shown) into the vehicle to be ventilated. From theinterior of the vehicle the air escapes through the openings 39 in thehubdisc of the fan-wheel l9- According to the position occupied by thebody 16 agreater part or a smaller part of the used air and the enteringfresh air will be mixed together and in this way the mixture will betempered to the extent desired.

The invention is not limited to the illustrated embodiment. It may bevaried in several ways Without departing from its principle.

The body l6 may for instance be made as a fixed one, the lower part ofwhich is provided with adjustable openings, and the inlet and outletchannels may be changed, so that the inlet channel is placed in thecentre and the outlet channel becomes the annular channel between themantle and the body It.

The ventilating arrangement is preferably mounted in the ceiling of thevehicle in the manner indicated in Figures 1 and 2 and it may in usualmanner be combined with a filter, heatbatteries and cold ones,humidifying devices etc. which may be required for an air-conditioningplant.

Having now described my invention, what I claim as new, and desire tosecure by United States Letters Patent, is:

1. In an apparatus for ventilating vehicles: a tubular passagewayopening at one end to the atmosphere; a combined suction and exhaust fanat the other end of said passageway; means covering the atmospheric endof said passageway and providing separate lateral annular channelscommunicating therewith; and a tubular member mounted for axialniovementbridging the distance between said means and fan dividing saidpassageway into concentric intake and exhaust channels, the axialposition of said member governing intercommunication of said intake andexhaust channels to control mixing of entering and exhaust air.

2. A ventilating device for railway carriages, buses and similarvehicles comprising: inner and outer conduits adapted to be mountedsubstantially perpendicularly to a wall of the vehicle and providing aninner centrally disposed channel and an outer coaxially situatedchannel, said channels each connecting with the inside and outside ofthe vehicle; fan means associated with said conduits to draw fresh airfor the vehicle through One channelv and exhaust air from the vehiclethrough the other channel, means providing an opening for admission ofexhaust air into the fresh air channel; and adjustable means to varysaid opening whereby the proportion of exhaust air admixed with freshair supplied to the vehicle is varied.

3. An apparatus as specified in claim 2 wherein said adjustable meanscomprises the inner conduit movably supported for axial bodily movement.

4. An apparatus as specified in claim 3 havin a cap surmounting saidinner conduit on the extenor of the vehicle in spaced relation to saidinner conduit, whereby axial movement of the inner conduit adjusts thespace between the cap and inner conduit to vary the air flow through theinner conduit.

5. Apparatus as specified in claim 2, wherein said adjustable meanscomprises the inner conduitmovably supported for axial bodily movement,and a remote-control lever mechanism for moving said inner conduit.

6. Apparatus as specified in claim 2, wherein said adjustable meanscomprises the inner conduit movably supported for axial bodily movement,and wherein the conduits have cooperating guide means to preventrotation of the inner conduit.

'7. A ventilating device for railway carriages, buses and similarvehicles comprising: inner and outer conduits adapted to be mounted in awall of the vehicle and providing an outer channel for air surroundingan inner channel, said channels communicating between the inside andoutside of the vehicle; a fan adjacent the inner ends of said conduits,said fan-having central blades for forcing air through the inner channeland peripheral blades for drawing air thropgh the outer channel anddischarging the air tangentially; said inner conduit being locatedbetween the central and peripheral blades; and means supporting saidinner conduit for axial movement to and from said fan to provide anadjustable space between the inner conduit and fan for proportioningadmixture of exhaust air with fresh air supplied to the vehicle.

8. A ventilating apparatus as specified in claim 7 wherein the end ofthe inner conduit adjacent the fan is outwardly flared with its flarededge substantially in alignment with the edge of the .outer conduitwhereby axial movement of the inner conduit simultaneously inverselyvaries the space between the fan and the inner conduit, and the spacebetween the edge of the outer conduit and the flared edge to restrictflow of air through the outer channel.

9. An apparatus for ventilating vehicles comprising: an inner wallproviding a central air channel; an outer wall surrounding the inner,wall in spaced relation'to provide an outer end channel therebetween;fan means in at least one of said channels for driving air therethrough;means controlling communication between said channels adjacent said fanmeans; a cap surmounting said inner wall in spaced relation thereto; andmeans for varying the space between the cap and inner wall. v

10. An apparatus as specified in claim 9 having a lateral flangedividing the space between said cap and the edge of the second wallremote from the fan means, said cap and flange providing circumferentiallateral passages connecting said respective channels and the surroundingatmosphere.

' 11. A ventilating apparatus as specified in claim 9 having a spindlesecured to said cap and said latter means comprises said inner Wallslidably carried on said spindle.

12. An apparatus for ventilating vehicles comprising: a fan having acentral set of blades disposed to direct air axially in one direction,and a set of peripheral blades to direct air tangentially; a sleevemounted for axial movement toward and away from the fan between saidsets of blades and providing a central air channel; a second sleevesurrounding the first sleeve in spaced relation to provide a secondchannel for air to the peripheral blades; a cap for the first sleevecarried in spaced relation thereto by the second sleeve; and a flangecarried by the second sleeve between the cap and second sleeve toprovide circumferential passages connecting said air channels to theatmosphere.

13. An apparatus for ventilating vehicles comprising an outer wall; ahood surmounting said wall in spaced relation to the edge thereof andhaving a downturned exterior flange and a central opening; a capsurmounting the opening of the first hood in spaced relation thereto andhaving an exterior downturned flange; a fan adjacent the opposite end ofsaid wall; and a sleeve in spaced relation to said wall forming acentral and a peripheral air passage and axially movable between the fanand the hood, said sleeve having its end flared adjacent the fan.

14. An apparatus for ventilating vehicles comprising: a fan having acentral set of blades disposed to direct air axially in one direction,and a set of peripheral blades to direct air tangentially; a sleevehaving a flared end adjacent the fan and mounted for axial movementbetween said sets of blades to provide a central air channel; a secondsleeve surrounding the first sleeve in spaced relation to provide asecond channel for air to the peripheral blades; and a cap for the firstsleeve carried in spaced relation thereto by the second sleeve.

SUNE OSSIAN RYGARD.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 757,348 Ross Apr. 12, 19042,126,230 Troxell, Jr; Aug. 9, 1938 2,189,008 Kurth Feb. 6, 19402,190,937 Demuth Feb. 20, 1940 2,199,525 Kurth May 7, 1940 2,274,033Booth Feb. 24, 1942 FOREIGN PATENTS Number Country Date A 371,219 GreatBritain Apr. 21, 1932 388,145 Great Britain Feb. 23, 1933

